Description
Calconcarboxylic acid is a p.a. grade metal indicator used in complexometric and related analytical procedures. It carries CAS number 3737-95-9, empirical formula C₂₁H₁₄N₂O₇S and a molar mass of 438,41 g/mol. As a specialised indicator dye, calconcarboxylic acid supports visual endpoint detection in titrations involving metal ions, particularly where sharp colour transitions improve precision in water hardness and other complexometric assays. The reagent is Offered as p.a. material from manufacturer Carl ROTH, it aligns with purity requirements typical of indicator chemistry in research and quality control. EG number 223-117-0 provides the regulatory substance identifier. Categorised among metal indicators, this calconcarboxylic acid preparation combines defined molecular data with practical pack size for complexometry, teaching laboratories and method development where reliable indicator performance is essential.
This article is part of Analytical grade solvents (p.a.), in Solvents.
Key features
- Appearance: black-violet powder
- Maximum absorption: ≤572 nm
- CAS number: 3737-95-9
- Pack sizes: 5 g, 10 g, 50 g
- EG nr.: 223-117-0
- Empirical formula: C₂₁H₁₄N₂O₇S
- Molar mass: 438,41 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
WarningHazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Calconcarboxylic acid, p.a., 5 g, glass
What is this article?
Calconcarboxylic acid, p.a., 5 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Analytical grade solvents (p.a.), inside Solvents, in Lab chemicals.
An analytical-grade solvent, often marked p.a., has impurity limits tight enough for classical analysis and for preparing reagents. It is not automatically low enough in UV absorbance for HPLC, and it is not dry enough for a water-sensitive reaction. The grade is the purchase.
A solvent dissolves. The grade says which impurities are low enough for the method. Analytical grade is the ordinary pure solvent. HPLC and LC-MS grades limit the absorbance and the ions that would become peaks or background. A dry solvent has had water removed. A deuterated solvent is for NMR, where the hydrogen signal would otherwise drown the sample. Technical grade is for cleaning and for synthesis that does not need a chromatogram. Identity is on PubChem. Names follow IUPAC. Hazards follow ECHA, the CLP Regulation and REACH.
Which category should I open next?
The category is Solvents. The sub-category is Analytical grade solvents (p.a.). The catalogue is Lab chemicals.
Shelves beside this one are HPLC & LC-MS grade solvents, Dry & deuterated solvents (NMR, synthesis), Technical & synthesis grade solvents and Green & alternative solvents.
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The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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